CAI and rough starting idle

[AllLostThings]

Anyone else have this? It's not really bad but just kind of backfires a little I guess you could say. It's only for a few seconds when I first start the car and then it runs fine

 

[Derek88]

It's because you hurt the car's feelings by getting the cheap CAI...


j/k

 

[AllLostThings]

Hey spending another $120+ (I got a really good deal thanks to a member on here) to maybe get what was dynoed at 2 hp more didn't make sense to me.

 

[CX-7owner]

Did the car have time to adjust to the new CAI?

 

[AllLostThings]

It's bee doing if from the start, on colder mornings really. Now that you mention it I don't think it really did it this morning. I've only got 2300 on the car so I guess maybe the ECU is adjusting.

 

[ovillems3]

i have the same problem, when its cold and after it sat for awhile(overnight)
it revs up to 2100 rpm and settles for mabye a sec. then dies or slowly dies.
when i put my foot on the gas to keep the revs up it wants to cut out even more. I reset my mpg to 0 then started it, when it was warm my mpg said 999.9!, another time i started it and as soon as it could idle on its own i drove it and the mpg was 25 and up(barely touching the gas) it should be around 4-8 mpg. and i live in canada so obviously the reading is a little different.
so its running rich, someone mentioned to me that it has to do with it being in open loop or closed loop(1 or the other) i cant remember.


but ya ive been wait for the cold so this problem happens more often so the dealer can fix it.

 

[CX-7owner]

This is all normal, the Hi revving idle is so you can warm up the engine much faster.

 

[knowledge007]

Hi rev during cold starts is normal.

You must disconnect the negative battery cable and drain all power from the car thats being stored. Tap the brakes to do so. ECU must be reset in order to adapt.

 

[shamrock]

This is all normal, the Hi revving idle is so you can warm up the engine much faster.

I also believe that it is the car sucking in a lot of cold air upon start up

 

[CX-7owner]

Hmm?

I also believe that it is the car sucking in a lot of cold air upon start up

 

[AllLostThings]

Yeah it's nto the high reving that i was wondering about it was the sputtering/back firing type thing it was doing. i guess it's only from the cold weather anyway. thanks guys.

 

[shamrock]

Hmm?

What do you mean by Hmmm(wink)

 

[knowledge007]

Yeah it's nto the high reving that i was wondering about it was the sputtering/back firing type thing it was doing. i guess it's only from the cold weather anyway. thanks guys.

Well there is an update for our ECU's specifically targeting cold startup A/F ratios. When did you purchase the car?

 

[CX-7owner]

What do you mean by Hmmm(wink)

lol I meant what would be the cause of the car sucking in cold air, I wasn't understanding.

 

[ovillems3]

my build date is 08/06, i bought it in january 07. everytime i go to the dealer the shop foreman hooks my car up to the computer and there is no update, hopefully next time i go they will have it.

mabye its a different kind of update?.

 

[knowledge007]

You prolly already have it. When you go back just ask when is the last time they checked for an update from mazdausa?

 

[Moonpie.Express]

i have the same problem, when its cold and after it sat for awhile(overnight)
it revs up to 2100 rpm and settles for mabye a sec. then dies or slowly dies.
when i put my foot on the gas to keep the revs up it wants to cut out even more. I reset my mpg to 0 then started it, when it was warm my mpg said 999.9!, another time i started it and as soon as it could idle on its own i drove it and the mpg was 25 and up(barely touching the gas) it should be around 4-8 mpg. and i live in canada so obviously the reading is a little different.
so its running rich, someone mentioned to me that it has to do with it being in open loop or closed loop(1 or the other) i cant remember.


but ya ive been wait for the cold so this problem happens more often so the dealer can fix it.

Just to let you know, I am still having that same problem. I am quite fed up with so called "technician/mechanics" that cannot (or will not) understand and troubleshoot without a code.

 

[shamrock]

I wonder if any 08's are having this issue. Also, did they fix the engine mount problem for 08. Anyone know(nailbyt)

 

[CX-7owner]

They did fix the motor mount issue.

 

[AllLostThings]

I got it at Werner Mazda in Manchester NH